Patents by Inventor Victor C. Wong
Victor C. Wong has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20110228067Abstract: A method for obtaining an image of tooth tissue directs incident light toward a tooth, wherein the incident light excites a fluorescent emission from the tooth tissue. Specular reflection of incident light from the tooth tissue is reduced. Fluorescence image data is obtained from the fluorescent emission. Back-scattered reflectance image data is obtained from back-scattered light from the tooth tissue. The fluorescence and back-scattered reflectance image data are combined to form an enhanced image of the tooth tissue for caries detection.Type: ApplicationFiled: May 27, 2011Publication date: September 22, 2011Inventors: Victor C. Wong, Rongguang Liang, Donna K. Rankin-Parobek
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Patent number: 7974453Abstract: A method for obtaining an image of tooth tissue directs incident light toward a tooth (20), wherein the incident light excites a fluorescent emission from the tooth tissue. Fluorescence image data (50) is obtained from the fluorescent emission. Back-scattered reflectance image data (52) is obtained from back-scattered light from the tooth tissue. The fluorescence and back-scattered reflectance image data are combined to form an enhanced image (64) of the tooth tissue for caries detection.Type: GrantFiled: August 14, 2009Date of Patent: July 5, 2011Assignee: Carestream Health, Inc.Inventors: Victor C. Wong, Rongguang Liang, Donna K. Rankin-Parobek
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Publication number: 20110085713Abstract: A method for identifying tooth regions. The method includes generating a first threshold image from a first tooth image by selecting intensity data values higher than a first predetermined threshold value c1; generating a second threshold image from a second tooth image by selecting intensity data values higher than a second predetermined threshold value c2; generating a preliminary tooth regions image that defines at least a first tooth region from the intersection of the first and second threshold images; generating a reference binary image from the first image by selecting intensity data values higher than a third predetermined threshold value c3, wherein threshold value c3 exceeds c1; and generating a refined tooth regions image from at least the first tooth region in the preliminary tooth regions image. The first tooth region is connected to objects in the reference binary image.Type: ApplicationFiled: October 14, 2009Publication date: April 14, 2011Inventors: Jiayong Yan, Wei Wang, Liangliang Pan, Victor C. Wong
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Publication number: 20110085715Abstract: A method for locating one or more interproximal tooth regions in a digital tooth image. The method can be executed at least in part on data processing hardware. The method includes generating the digital tooth image from a fluorescence image of one or more teeth and a reflectance image of the one or more teeth, so as to combine image data from the fluorescence and reflectance images. The digital tooth image has intensity values for pixels corresponding to the one or more teeth and background. The method identifies one or more tooth regions by processing the digital tooth image and locates the one or more interproximal tooth regions according to the one or more identified tooth regions.Type: ApplicationFiled: October 14, 2009Publication date: April 14, 2011Inventors: Jiayong Yan, Wei Wang, Liangliang Pan, Victor C. Wong
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Publication number: 20110085714Abstract: A method for extracting a carious lesion area from sound regions of a tooth. In one embodiment, the method includes generating a digital image of the tooth; identifying tooth regions; extracting a suspicious lesion area by using a marker-controlled watershed algorithm or by using a morphological bottom-hat based method along with a multi-resolution surface reconstruction method; and removing false positives. In another embodiment, the method includes generating a digital image of the tooth comprising obtaining a fluorescence image of the tooth, obtaining a reflectance image of the tooth, and combining image data for the fluorescence and reflectance images; identifying tooth regions; extracting suspicious lesion areas; and removing false positives.Type: ApplicationFiled: October 14, 2009Publication date: April 14, 2011Inventors: Jiayong Yan, Wei Wang, Liangliang Pan, Victor C. Wong
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Publication number: 20100322490Abstract: A method for quantifying caries, executed at least in part on data processing hardware, the method comprising generating a digital image of a tooth, the image comprising intensity values for a region of pixels corresponding to the tooth, gum, and background; extracting a lesion area from sound tooth regions by identifying tooth regions, extracting suspicious lesion areas, and removing false positives; identifying an adjacent sound region that is adjacent to the extracted lesion area; reconstructing intensity values for tooth tissue within the lesion area according to values in the adjacent sound region; and quantifying the condition of the caries using the reconstructed intensity values and intensity values from the lesion area.Type: ApplicationFiled: June 19, 2009Publication date: December 23, 2010Inventors: Liangliang Pan, Jiayong Yan, Wei Wang, Lixing Shi, Victor C. Wong
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Patent number: 7844091Abstract: A method for caries detection uses an image capture device (30, 32) to obtain fluorescence image data from the tooth (20) by illuminating the tooth to excite fluorescent emission. A first enhanced image of the tooth is then obtained by illuminating the tooth at a first incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. A second enhanced image of the tooth is then obtained by illuminating the tooth at a second incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. The first and second enhanced images are then analyzed to select and display the best-contrast image. This method provides high contrast images for carious regions (58) on all tooth surfaces.Type: GrantFiled: July 9, 2009Date of Patent: November 30, 2010Assignee: Carestream Health, Inc.Inventors: Victor C. Wong, Rongguang Liang, Michael A. Marcus, Paul O. McLaughlin, David L. Patton
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Publication number: 20100165089Abstract: An apparatus for imaging a tooth having a light source with a first spectral range and a second spectral range. A polarizing beamsplitter (18) light having a first polarization state toward the tooth and directs light from the tooth having a second polarization state along a return path toward a sensor (68), wherein the first and second polarization states are orthogonal. A first lens (22) in the return path directs image-bearing light from the tooth, through the polarizing beamsplitter (18), toward the sensor (68), and obtains image data from the redirected portion of the light having the second polarization state. A long-pass filter (15) in the return path attenuates light in the second spectral range. Control logic enables the sensor to obtain either the reflectance image or the fluorescence image.Type: ApplicationFiled: March 15, 2010Publication date: July 1, 2010Inventors: Rongguang Liang, Victor C. Wong, Mark E. Bridges, Michael A. Marcus, David L. Patton, Peter D. Burns, Paul O. McLaughlin
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Publication number: 20100128959Abstract: A method for forming an enhanced image of tooth tissue for caries detection obtains fluorescence and reflectance image data from a tooth. Each pixel in the fluorescence image data is combined with its corresponding pixel in the reflectance image data by subtracting an offset to the reflectance image data value to generate an offset reflectance image data value, and then computing an enhanced image data value according to the difference between the fluorescence image data value and the offset reflectance image data value, whereby the enhanced image is formed from the resulting pixel array of enhanced image data values.Type: ApplicationFiled: January 25, 2010Publication date: May 27, 2010Inventors: Victor C. Wong, Rongguang Liang
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Patent number: 7702139Abstract: An apparatus for imaging a tooth having a light source with a first spectral range and a second spectral range. A polarizing beamsplitter (18) light having a first polarization state toward the tooth and directs light from the tooth having a second polarization state along a return path toward a sensor (68), wherein the first and second polarization states are orthogonal. A first lens (22) in the return path directs image-bearing light from the tooth, through the polarizing beamsplitter (18), toward the sensor (68), and obtains image data from the redirected portion of the light having the second polarization state. A long-pass filter (15) in the return path attenuates light in the second spectral range. Control logic enables the sensor to obtain either the reflectance image or the fluorescence image.Type: GrantFiled: October 13, 2006Date of Patent: April 20, 2010Assignee: Carestream Health, Inc.Inventors: Rongguang Liang, Victor C. Wong, Mark E. Bridges, Michael A. Marcus, David L. Patton, Peter D. Burns, Paul O. McLaughlin
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Patent number: 7679061Abstract: An x-ray imaging source comprises a radiation source (12) providing x-ray radiation. A substrate comprised of a scintillating material (16) responsive to a level of incident radiation provides output light according to the level of incident radiation. A Fresnel lens (40) is disposed proximate to the substrate for directing the output light toward a second lens. The second lens directs the output light to an image sensor for converting light levels to the digital data, forming an image thereby.Type: GrantFiled: November 22, 2005Date of Patent: March 16, 2010Assignee: Carestream Health, Inc.Inventors: Victor C. Wong, Rongguang Liang
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Patent number: 7668355Abstract: A method for forming an enhanced image of tooth tissue for caries detection obtains fluorescence (50) and reflectance (52) image data from a tooth (20). Each pixel in the fluorescence image data is combined with its corresponding pixel in the reflectance image data by subtracting an offset to the reflectance image data value to generate an offset reflectance image data value, and then computing an enhanced image data value according to the difference between the fluorescence image data value and the offset reflectance image data value, whereby the enhanced image (64) is formed from the resulting pixel array of enhanced image data values.Type: GrantFiled: August 31, 2006Date of Patent: February 23, 2010Assignee: Carestream Health, Inc.Inventors: Victor C. Wong, Rongguang Liang
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Publication number: 20090297003Abstract: A method for obtaining an image of tooth tissue directs incident light toward a tooth (20), wherein the incident light excites a fluorescent emission from the tooth tissue. Fluorescence image data (50) is obtained from the fluorescent emission. Back-scattered reflectance image data (52) is obtained from back-scattered light from the tooth tissue. The fluorescence and back-scattered reflectance image data are combined to form an enhanced image (64) of the tooth tissue for caries detection.Type: ApplicationFiled: August 14, 2009Publication date: December 3, 2009Inventors: Victor C. Wong, Rongguang Liang, Donna K. Rankin-Parobek
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Publication number: 20090274998Abstract: A method for caries detection uses an image capture device (30, 32) to obtain fluorescence image data from the tooth (20) by illuminating the tooth to excite fluorescent emission. A first enhanced image of the tooth is then obtained by illuminating the tooth at a first incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. A second enhanced image of the tooth is then obtained by illuminating the tooth at a second incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. The first and second enhanced images are then analyzed to select and display the best-contrast image. This method provides high contrast images for carious regions (58) on all tooth surfaces.Type: ApplicationFiled: July 9, 2009Publication date: November 5, 2009Inventors: Victor C. Wong, Rongguang Liang, Michael A. Marcus, Paul O. McLaughlin, David L. Patton
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Patent number: 7596253Abstract: A method for obtaining an image of tooth tissue directs incident light toward a tooth (20), wherein the incident light excites a fluorescent emission from the tooth tissue. Specular reflection of incident light from the tooth tissue is reduced. Fluorescence image data (50) is obtained from the fluorescent emission. Back-scattered reflectance image data (52) is obtained from back-scattered light from the tooth tissue. The fluorescence and back-scattered reflectance image data are combined to form an enhanced image (64) of the tooth tissue for caries detection.Type: GrantFiled: October 31, 2005Date of Patent: September 29, 2009Assignee: Carestream Health, Inc.Inventors: Victor C. Wong, Rongguang Liang, Donna K. Rankin-Parobek
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Patent number: 7577284Abstract: A method for caries detection uses an image capture device (30, 32) to obtain fluorescence image data from the tooth (20) by illuminating the tooth to excite fluorescent emission. A first enhanced image of the tooth is then obtained by illuminating the tooth at a first incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. A second enhanced image of the tooth is then obtained by illuminating the tooth at a second incident angle, obtaining a back-scattered reflectance image data from the tooth tissue, and combining the back-scattered reflectance image data with the fluorescence image data. The first and second enhanced images are then analyzed to select and display the best-contrast image. This method provides high contrast images for carious regions (58) on all tooth surfaces.Type: GrantFiled: April 21, 2006Date of Patent: August 18, 2009Assignee: Carestream Health, Inc.Inventors: Victor C. Wong, Rongguang Liang, Michael A. Marcus, Paul O. McLaughlin, David L. Patton
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Publication number: 20090185712Abstract: A method for displaying live video of a tooth identifies a tooth tissue region in a viewable image frame obtained from a video stream and processes pixel data within the tooth tissue region to identify a suspected caries site. Intensity values for pixels that correspond to the suspected caries site are modified and a highlighted viewable image frame is formed as a combination of the modified intensity values corresponding to the suspected caries site and other pixel values in the viewable image frame. The highlighted viewable image frame is displayed in video form.Type: ApplicationFiled: January 22, 2008Publication date: July 23, 2009Inventors: Victor C. Wong, Gary M. Spinelli, Peter D. Burns, Paul O. McLaughlin, Jean Marc Inglese
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Publication number: 20080170764Abstract: A method is disclosed for processing of images to detect dental caries, that includes the following steps. Directing incident light (16) toward a tooth (20), where this light excites a fluorescent emission from the tooth. Obtaining a fluorescence image (35) from the fluorescent light component (19), and obtaining a reflectance image (34) from the back-scattered light (18) from the tooth. Applying a color balance operation to the reflectance image. Removing the specular reflectance components from the color balanced reflectance image (82) to give a back-scattered reflectance image (50). Registering the fluorescent image with the back-scattered reflectance image. Combining the registered fluorescent image (115) with the back-scattered reflectance image to provide a diagnostic image (52).Type: ApplicationFiled: January 17, 2007Publication date: July 17, 2008Inventors: Peter D. Burns, Victor C. Wong, Mark E. Bridges, Rongguang Liang
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Publication number: 20080118886Abstract: An apparatus (10) for obtaining an image of a tooth (20) includes an image sensor and a white light source (12) providing broadband polychromatic light and an ultraviolet light source providing narrow-band light. A combiner (15) directs broadband polychromatic light and narrow band light along a common illumination path to illuminate the tooth. A polarization beamsplitter (18) directs polarized light from the illumination path along an optical axis (216). An optical coherence tomography (OCT) imaging apparatus (70) splits the low coherence light into a sample path and a reference path and a dichroic element (78) directs the polarized illumination and the sample path low coherence light along the optical axis. An image processor (100) identifies a region of interest according to either a white light image (124), a fluorescent light image (120), or both and the OCT imaging apparatus obtains an OCT image over the region of interest.Type: ApplicationFiled: November 21, 2006Publication date: May 22, 2008Inventors: Rongguang Liang, Michael A. Marcus, David L. Patton, Laurie L. Voci, Victor C. Wong, Paul O. McLaughlin, Mark E. Bridges
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Publication number: 20080090198Abstract: An apparatus for imaging a tooth having a light source with a first spectral range and a second spectral range. A polarizing beamsplitter (18) light having a first polarization state toward the tooth and directs light from the tooth having a second polarization state along a return path toward a sensor (68), wherein the first and second polarization states are orthogonal. A first lens (22) in the return path directs image-bearing light from the tooth, through the polarizing beamsplitter (18), toward the sensor (68), and obtains image data from the redirected portion of the light having the second polarization state. A long-pass filter (15) in the return path attenuates light in the second spectral range. Control logic enables the sensor to obtain either the reflectance image or the fluorescence image.Type: ApplicationFiled: October 13, 2006Publication date: April 17, 2008Inventors: Rongguang Liang, Victor C. Wong, Mark E. Bridges, Michael A. Marcus, David L. Patton, Peter D. Burns, Paul O. McLaughlin